Question #1ddfb

1 Answer
Apr 25, 2015

Elements in the same group (family or column) on the periodic table have similar properties. This due primarily to their electron configurations, in which the number of valence electrons are the same.

Sodium is group 1/IA, the alkali metals, on the periodic table. Therefore, the other elements in this group will have similar properties as sodium. These would include, lithium, potassium, rubidium, and cesium. All of these elements have an electron configuration that ends with #"s"^1"#. Francium's properties have not been determined experimentally, because so far there has not been enough of it to experiment with.